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Pre-build architecture review

Give the agent a system before code.

Turn one MVP brief into an agreed architecture, dangerous assumptions, and a build order your coding agent—or engineer—can actually follow.

$19 once One connected package No subscription
spire / semantic model stable
HTTPSOIDCRESTSQLUIWeb appNext.js · edgeGWAPI gatewayrouting · authIDIdentitysessions · RBACSCore APIbilling · tenancyDBPostgressystem of recordQWorkerevents · retries

12

components

18

typed flows

03

open risks

/01

One semantic model

Every artifact points to the same system.

/02

Trade-offs exposed

Chosen and rejected options stay visible.

/03

Risks before files

Auth, data, payments, and failure modes.

/04

Structurally checked

Coverage and consistency—not vague confidence.

/ 01 · Inspect the system

Not a diagram. A decision system.

The canvas is one view. Risks, API boundaries, data relationships, deployment, and build order all resolve back to the same typed model.

One source · five views · explicit trade-offs

architecture · generated semantic model
HTTPSsessionRESTSQLsessionsSWeb AppNext.js · 3000GWAPI GatewayKong · 8000SAuthNode · 4001SOrdersPython · 4002DBPostgresv16 · 5432CRedisv7 · 6379

A Spire package keeps diagrams, API contracts, ERDs, flows, deployment, critique, and validation tied to the same underlying model.

/ 02 · The package

Four connected evidence layers. Each one answers a different question before implementation begins.

The questions your agent won't remember to ask.

Evidence 01

Review Pack

Decision narrative, risks, forces, ADRs, and implementation plan.

Connected to the model
Evidence 02

Semantic Diagram

Typed components, edges, storage, queues, gateways, and service boundaries.

Connected to the model
Evidence 03

Data + API

ERD, API contract, sequence flows, and deployment topology.

Connected to the model
Evidence 04

Validation Evidence

Coverage, orphan checks, critique findings, and confidence metadata.

Connected to the model

/ 03 · Review sequence

Intent before components. Evidence before confidence.

Spire is intentionally not a blank canvas. The sequence keeps product intent, architecture choices, critique, and structural checks connected.

  1. 01

    Frame the real build

    Users, critical journeys, constraints, integrations, and what can wait.

  2. 02

    Choose the smallest safe system

    Boundaries, data ownership, APIs, deployment, and meaningful alternatives.

  3. 03

    Critique the recommendation

    Assumptions, dangerous blind spots, rejected options, and unresolved risks.

  4. 04

    Check the pieces agree

    Journey coverage, identifier integrity, reachability, and cross-artifact consistency.

What leaves the review

A system your builder can interrogate—not blindly obey.

Trace

See how the package was assembled.

Critique

Challenge risks and assumptions.

Export

Move the agreed plan into the repo.

Why Spire

A planning deliverable, not another drawing surface.

Diagram tools help you draw and general AI helps you discuss. Spire starts from the product brief, builds one semantic model, and keeps its architecture views and decision narrative connected.

How a Spire Single Architecture compares with diagram workspaces and general AI chat.
WorkflowSpireDiagram workspaceGeneral AI chat
Starting pointA guided product briefA blank canvas or existing textOne prompt at a time
Primary outputA connected architecture packageAn editable visualA conversational answer
System, data, APIs, and deploymentDerived from one semantic modelKept aligned by the authorGenerated across separate responses
Risks, assumptions, and rejected optionsIncluded in the review packAdded manuallyDepends on every prompt
Structural checksCoverage, reachability, and consistencyVisual or syntax validationVerified manually
Buying model$19 once for one architectureUsually recurring tool accessSeparate AI subscription or usage

Use the public sample to inspect the workflow before checkout. Personalized architecture generation begins only after a Single Architecture payment or another paid access offer.

/ 05 · Start with one build

Buy the decision pack. Not another subscription.

Begin with one Single Architecture. Repeat-access options exist for builders who already know they need another project or their own model routing.

Start hereOne architecture

Single Architecture

$19

once

For a founder or engineer preparing one real product build.

  • $19 one-time payment before generation
  • One connected architecture package for one product
  • Full diagrams, documents, and exports after generation
  • One bounded revision

One payment · no subscription

Create one for $19 →
Budget BYOK access

Builder BYOK Month

$9

/ 30 days

For a solo builder planning one product with their own model key.

  • One named user and one new architecture project
  • Refine that project throughout active access
  • Use your own compatible AI provider key
  • Completed artifacts stay readable and exportable
  • New generation and refinement stop after 30 days

Provider bills usage and controls balance, quotas, rate limits, and availability

Choose Builder BYOK →
Your model key

Founder BYOK

$200

once

For repeat builders who already have a compatible AI provider key.

  • One named user
  • Use your own compatible AI provider key
  • Generate up to 25 architecture projects
  • Standard diagrams, documents, and exports

AI provider usage is billed separately

Choose Founder BYOK →
Spire-managed models

Managed Build Month

$29

/ 30 days

For an active build that needs managed generation without key setup.

  • One new architecture
  • Up to 12 refinements
  • Spire-managed AI routing
  • Completed project remains available to read

A fixed 30-day pass · does not auto-renew

Choose a Build Month →
$19 once · full workspace after generation

Put a system behind the build before the agent starts creating files.

Purchase one architecture, run the generation, then open the complete diagrams, documents, and exports in your workspace.

Create for $19One project · one payment · no subscription